运算符优先级

1. 优先级

2. js 代码

        //  ++num   !num     2 + 3
        console.log(4 >= 6 || '人' != '阿凡达' && !(12 * 2 == 144) && true)
        var num = 10;
        console.log(5 == num / 2 && (2 + 2 * num).toString() === '22');
        console.log('-------------------');
        var a = 3 > 5 && 2 < 7 && 3 == 4;
        console.log(a);

        var b = 3 <= 4 || 3 > 1 || 3 != 2;
        console.log(b);

        var c = 2 === "2";
        console.log(c);

        var d = !c || b && a;
        console.log(d);
　　　　　结果为 : true  true  false true false true